Add wheel scroll settings

[klovinad]

Summary

This proposes two related mouse-control improvements:

• Change the default horizontal gesture-button swipes to switch macOS desktops/spaces:
  • Left → Previous Desktop
  • Right → Next Desktop
• Add app-wide scroll wheel preferences:
  • invert wheel direction
  • scroll strength multiplier
  • tactility/chunking

Implementation notes

• Scroll preferences are persisted in AppSettings and mirrored into the hook runtime through a shared ScrollSettings value.
• The hook transforms captured scroll events only when non-default scroll settings are active; default settings pass through natively.
• Synthetic transformed scroll events are posted at the session tap to avoid being re-captured by OpenLogi's own HID event tap.
• Added unit coverage for scroll axis ordering, inversion, and chunking.

Verification

Ran locally on macOS:

cargo fmt --all
cargo check -p openlogi-gui
cargo test -p openlogi-gui -p openlogi-core

Results:

• openlogi-core: 34 passed
• openlogi-gui: 14 passed

[pullfrog]

ℹ️ Minor suggestions inline — one observation about the scroll-settings default check.

Reviewed changes — Adds three scroll-preference controls (invert, strength, tactility) to the Settings window and changes default horizontal gesture swipes to desktop/Space switching.

• Default gesture direction update — PrevTab/NextTab replaced with PreviousDesktop/NextDesktop.
• ScrollSettings shared state — Arc<RwLock<ScrollSettings>> mirrors the persisted config to the hook runtime.
• Scroll event transformation — transform_scroll/quantize_scroll apply inversion, strength, and chunking to captured wheel events.
• Session-tap re-injection — Transformed scroll events are posted at CGEventTapLocation::Session to avoid re-capture by OpenLogi's HID tap.
• Settings UI — Invert switch, strength slider (1–10), and tactility slider (0–10) in a new "Scroll" group box.
• Generalized setting_row — Signature changed from control: Switch to control: impl IntoElement to accept sliders alongside switches.
• Expanded native-click passthrough — Back→BrowserBack and Forward→BrowserForward added.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using Big Pickle (free) (credentials for Anthropic not configured) ｜ 𝕏}

[pullfrog]

✅ Prior feedback addressed — no new issues found.

Reviewed changes — Fixed the ScrollSettings::default() mismatch with AppSettings defaults by replacing the derived Default with a manual impl whose strength: 1 matches the app config.

• Manual Default impl for ScrollSettings — Replaced #[derive(Default)] with a manual impl Default where strength: 1 aligns with AppSettings::wheel_strength. This restores the identity fast-path in hook_runtime.rs.

  ^{｜ View workflow run ｜ Using Big Pickle (free) (credentials for Anthropic not configured) ｜ 𝕏}

[averypelle]

This should close #126